M2 Threaded Inserts - 70 Pieces RX-M2x4 Brass Heat Set Insert for Plastic Parts - Metric knurled Nuts - Insert by Heat into 3D Printing Components

Overall, I’m very happy with these heat inserts. They shipped quickly and arrived in good condition with no issues. In use, the machining appears to be high quality and the knurling is clean and consistent. Screws thread in smoothly without binding or cross-threading. I primarily use these for 3D printed parts and have not experienced any fitment or durability problems. They perform exactly as expected and I would recommend them to anyone installing threaded inserts in 3D prints.

Sizing was spot on for Sherpa heavy build. Easy to use and strong hold.

I have used Ruthex before. No problems. The inserts hold very well in #D prints. Recommended. Thanks.

Buy these, no matter what. You’ll regret buying from others, promise. I use thousands of these for my products for customers. They are essential to my business. I recently tried to buy another brand that was a little cheaper and it was a bad mistake. About half of them have damaged or defected threads, but you don’t know until after you try a screw in them. This has caused me many failed prints, a lot of money wasted. All because I tried to save a few bucks. I will never go to any other brand, this is literally the only one I trust. I don’t leave reviews, but after the nightmare with the other brand that starts with a U, I felt it was imperative I help out others. Don’t buy anything else.

These are very high quality inserts. They go into the plastic easily (I’ve been setting the temperature to 240C), and they hold extremely well.

I've never had any trouble setting these with my soldering iron. I don't use any additional tools, jigs, or presses. Pretty easy stuff They work well and don't come out. Big fan

This is going to sound trivial, but it didn’t come with the setting tip. These are some great inserts that work amazingly well. The fit is unmatched. I’ve tried other inserts and a lot of the cheaper ones have some sort of issue, either they don’t sear properly for some reason or they have burs or the threads either aren’t there or are cross threaded. The only thing that would make these better is if they came with the tip, otherwise great value.

Right size easy to work with good value